IMAGE-BASED MODELING TECHNIQUES FOR THE CREATION OF HIGH-QUALITY TEXTURE IN LASER SCANNER MODEL: A CASE STUDY IN FRESCOED VAULT

The new survey tools used in studies aimed to preserving arcbitectural heritage often show some dilemmas. Severa! studies bave been able to confirm that laser scanner surveys allow to obtain three-dimensional models of high accuracy in morphology and topologica! leve!. However, nowadays the quality leve! of colour obtained with laser scanners is not acceptable for high quality texturing. Moreover, high quality colour medels can be obtained through techniques of Structure from Modeling, but feature a lower precision of mesh, even though results obtainable by Computer Vision programs, make this approach increasingly viable. In this context, a case study is proposed on a vault located in the Palazzo Roncioni (Pisa, Italy) decorated with a important fresco painted by the painter Giovan Battista Tempesti in the second half of the eighth century. In this case, different tests will be carried out by Structure from Modeling techniques to bave a high resolution texture applied to the model obtained with laser scanner, thus obtaining a model with high resolution texture and high quality mesh. This model allows to generate an accurate documentati on of the vault for digitai preservation and restoration studies.